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Borate red fluorescent powder and preparation method and application thereof

A technology of red fluorescent powder and borate, which is applied in the field of fluorescent materials, can solve the problems of complex preparation methods, low color rendering index, and low luminous efficiency, and achieve the effects of simple preparation process, abundant sources, and low price

Inactive Publication Date: 2015-01-28
安徽长正升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third method is the lowest cost, simple, and most mature method. The phosphor is mainly YAG yttrium aluminum garnet, and its chemical formula is Y 3 Al 5 o 12 : Ce 3+ , the white light LED made of this kind of phosphor has high luminous efficiency, but due to the relatively small red light component in the emission spectrum, the color rendering index is low and the color temperature is high
Currently, commercial red phosphors for LEDs are mainly Y 2 o 2 S:Eu 3+ , the red phosphor is sulfide, the preparation method is complicated, and the luminous efficiency is low

Method used

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  • Borate red fluorescent powder and preparation method and application thereof
  • Borate red fluorescent powder and preparation method and application thereof
  • Borate red fluorescent powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation K 3 Y 0.95 Eu 0.05 B 6 o 12

[0025] According to chemical formula K 3 Y 0.95 Eu 0.05 B 6 o 12 , Weigh respectively: Potassium Carbonate K 2 CO 3 : 1.38191 g, yttrium oxide Y 2 o 3 : 0.7151 g, europium oxide Eu 2 o 3 : 0.0587 g, boric acid H 3 BO 3 : 2.4732 grams, ground and mixed in an agate mortar, pre-sintered in air atmosphere, pre-sintered temperature is 500 ° C, sintered time 7 hours, cooled to room temperature, take out the sample; it is fully ground again and placed in In a muffle furnace, calcining is carried out under an air atmosphere, the calcining temperature is 750° C., and the calcining time is 15 hours, to obtain a powdery borate-based red luminescent material.

[0026] See attached figure 1 , which is the X-ray powder diffraction pattern of the sample prepared according to the technical scheme of this embodiment, and the XRD test results show that the prepared borate K 3 Y 0.95 Eu 0.05 B 6 o 12 It is a single-phase mat...

Embodiment 2

[0030] Preparation K 3 Gd 0.9 Eu 0.1 B 6 o 12

[0031] According to chemical formula K 3 Gd 0.9 Eu 0.1 B 6 o 12 , Weigh respectively: Potassium nitrate KNO 3 : 2.022 g, gadolinium oxide Gd 2 o 3 : 1.0875 grams, europium nitrate Eu (NO 3 ) 3 -6H 2 O: 0.1487 g, boron oxide B 2 o 3: 1.3924 grams, after grinding and mixing in an agate mortar, select the air atmosphere for pre-sintering, the pre-sintering temperature is 350 ° C, the sintering time is 8 hours, cool to room temperature, take out the sample; grind it again and put it in the horse In a Furnace, it is calcined under air atmosphere, the calcining temperature is 900° C., and the calcining time is 12 hours, that is, the powdery borate red luminescent material is obtained. Its main structural properties, excitation spectrum and luminescence spectrum are similar to Example 1.

Embodiment 3

[0033] Preparation K 3 La 0.999 Eu 0.001 B 6 o 12

[0034] According to chemical formula K 3 La 0.999 Eu 0.001 B 6 o 12 , respectively weigh potassium hydroxide KOH: 1.122 grams, lanthanum oxide La 2 o 3 : 1.0849 grams, europium nitrate Eu (NO 3 ) 3 -6H 2 O: 0.0015 g, boron oxide B 2 o 3 : 1.3924 grams, after grinding and mixing in an agate mortar, select the air atmosphere for pre-sintering, the pre-sintering temperature is 600 ° C, the sintering time is 3 hours, then cool to room temperature, take out the sample; grind it again and put it in In a muffle furnace, calcining is carried out under an air atmosphere, the calcining temperature is 850° C., and the calcining time is 16 hours to obtain a powdery borate red luminescent material. Its main structural properties, excitation spectrum and luminescence spectrum are similar to Example 1.

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Abstract

The invention discloses borate red fluorescent powder and a preparation method and application thereof. The fluorescent powder is a borate material activated by rare-earth ions, wherein the chemical formula of the fluorescent powder is K3M1-xEUxB6O12; M is one of elements La, Gd and Y; and x is smaller than or equal to 1.0 and greater than or equal to 0.001. According to the borate red fluorescent powder prepared by a high-temperature solid-phase method, the position of a main emission peak is near 612 nanometers and coincided with an emission wavelength of a near ultraviolet semiconductor chip under excitation of near ultraviolet light. The red fluorescent powder disclosed by the invention is good in optical stability, high in red luminescent intensity, and ideal in color purity. The borate red fluorescent powder disclosed by the invention is low in cost, free of poison, free of pollution, and easy to operate and carry out industrial production.

Description

technical field [0001] The invention relates to a borate-based fluorescent powder that emits red fluorescence under near-ultraviolet light excitation, which can be coated and packaged on an InGaN diode to prepare a white LED lighting device, and belongs to the technical field of fluorescent materials. Background technique [0002] White LED (Light Emitting Diode) has many advantages such as non-toxic, high efficiency and energy saving, long life, shock resistance and safety consideration. It can be widely used in various lighting facilities. It is an environmentally friendly and energy-saving green lighting source, so it is generally regarded as a new light source to replace traditional lighting. [0003] At present, there are three main ways to achieve white LED lighting. The first way is to form white light through the combination of red, green and blue LED chips; the second way is to use quantum effect to realize single-chip white light; the third way is to use ultraviole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78H01L33/50
CPCY02B20/181Y02B20/00
Inventor 黄彦林魏东磊秦琳陶正旭关莹
Owner 安徽长正升科技有限公司
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